Windows 8 and 8.1 Forums


Re-install windows 8 from windows 7

  1. #1


    Posts : 14
    windows 7

    Re-install windows 8 from windows 7


    Some time ago I bought & installed windows 8. I bought online direct from microsoft. I didn't like it & used a disc image to return to windows 7.
    I now wish to try windows 8.1 & need to install windows 8 to do the upgrade.
    I have no record or product key for my purchase of windows 8.
    Where do I go from here or am I stuffed?

      My System SpecsSystem Spec

  2. #2


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    Check your email from MS Store.
      My System SpecsSystem Spec

  3. #3


    Posts : 14
    windows 7


    Looked before & couldn't find it. Looked again and there it was.
    Thanks.
      My System SpecsSystem Spec

  4. #4


    Posts : 1,720
    Windows 8.1 Pro


    @ denebarry: you should be good to go! Just make sure you create bootable usb media in the process.
      My System SpecsSystem Spec

  5. #5


    Posts : 14
    windows 7


    What do you mean? Create a bootable win8.1 USB stick after installation or win7 before or both?
      My System SpecsSystem Spec

  6. #6


    Posts : 14
    windows 7


    Where do I redownload win8 with existing product key?
      My System SpecsSystem Spec

  7. #7


    Posts : 1,720
    Windows 8.1 Pro


    ... workin on it, give me a few minutes.
    I'm in the process of downloading a fresh copy right now, I'll let you know how it goes.
      My System SpecsSystem Spec

  8. #8


    Posts : 1,720
    Windows 8.1 Pro


    Go here, read everything and click on the big blue 'Install Windows 8' button; it'll save a Setup file to your downloads......

    About.com: http://windows.microsoft.com/en-US/windows-8/upgrade-product-key-only

    ... run it;
    it'll ask for your product key, if that checks out your on your way;
    it will proceed to download the necessary files, (which is what I'm in the middle of), bout 15 min...
      My System SpecsSystem Spec

  9. #9


    Posts : 5,360
    7/8/ubuntu/Linux Deepin


    I don't need to install 8.0 before 8.1

    Don't bother downloading 8.0 just use the ltlle trick to d/l 8.1 iso file.

    Install it using generic key:

    Then activate with your original 8.0 key.

    Keys for 8.1 install:

    Core=334NH-RXG76-64THK-C7CKG-D3VPT
    Professional=XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB

    Enter slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX (Replace X's with your RETAIL Windows 8.0 key)
      My System SpecsSystem Spec

  10. #10


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    Take a look at those posts for more info.

    Windows 8 and Windows 8.1 ISO - Download or Create

    How to download Windows 8.1 ISO with a Windows 8 key.
    How to download the Windows 8.1 ISO

    Activate retail Windows 8.1 with Windows 8 Product key.
      My System SpecsSystem Spec

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Re-install windows 8 from windows 7
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